If you have friends or just acquaintances on social networks who are financially savvy, connecting to them on MeARKET might be good for your portfolio. The webapp lets you see their portfolios and when they buy or sell, so you can benefit from their knowledge.

MeARKET is a social investing site, but you can share as much as you want with your Facebook, LinkedIn, Twitter, or Yahoo! friends. It doesn't connect to your brokerage accounts automatically. You enter your portfolio and trades manually and can add stocks to a watch list, so even if you don't own stocks now, the site may be good for budding investors who just want to learn about investing. (Using pretend money is one way to learn how to invest, so theoretically you could use the site to do that.)

Investment games like the stock simulator offered by Investopedia and other sites can help you…
Read more Read more

If you don't have any investor friends yet, too, MeARKET (pronounced like the animal meerkat) shows holdings of everyone on the service, comments and discussions for specific stocks, and significant changes for stocks. Now if only I can add Warren Buffet as a Facebook friend...